I believe the answer is: Consumer goods (such as agriculture) and property
At 1920, our society just learnt to industrialized the production process using the development of technology. This create a massive oversupply for consumer goods that lead to falling demand because most consumers have more than they could normally consume.
"Auto industry" was the sector of the economy in the 1920s in which falling demand and <span>raising debt were a problem. The auto industry was the industry that was having huge problem in regards to selling of new cars. I hope that this is the answer that has actually come to your desired help.</span>
